221431477507564 has 12 divisors (see below), whose sum is σ = 400867329970800. Its totient is φ = 106897954658768.

The previous prime is 221431477507553. The next prime is 221431477507673. The reversal of 221431477507564 is 465705774134122.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a junction number, because it is equal to n+sod(n) for n = 221431477507499 and 221431477507508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 954446023624 + ... + 954446023855.

It is an arithmetic number, because the mean of its divisors is an integer number (33405610830900).

Almost surely, 2^{221431477507564} is an apocalyptic number.

It is an amenable number.

221431477507564 is a deficient number, since it is larger than the sum of its proper divisors (179435852463236).

221431477507564 is a wasteful number, since it uses less digits than its factorization.

221431477507564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908892047512 (or 1908892047510 counting only the distinct ones).

The product of its (nonzero) digits is 39513600, while the sum is 58.

The spelling of 221431477507564 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred seventy-seven million, five hundred seven thousand, five hundred sixty-four".